Okupakinga amakolero amazito kyetaagisa okusiba emiguwa egikwata wansi w’okusika omuguwa okutambula, okuziyiza okunyiga, era okuwona okutereka ebweru n’okuyita mu nnyanja. PET strap (polyester strap) ne polyester rope byombi bikozesebwa okunyweza omugugu, naye bikola mu ngeri ya njawulo nnyo. Omuguwa gwa poliyesita guwanvuwa wansi w’omugugu, gufiirwa okusika omuguwa ng’emigugu gutuuse, era gusika mangu ku mbiriizi z’ebyuma ebisongovu.
PET strap (polyester strap) esangibwa mu buwanvu okuva ku 0.4mm okutuuka ku 1.25mm, nga buli range ekwatagana n’ebyetaago by’omugugu ebitongole n’ebika by’ebyuma. Emiguwa emigonvu (0.4–0.55mm) giweereza emigugu gya paleedi emitono n’okupakinga okwa bulijjo, ate emiguwa emigonvu (0.8–1.25mm) gikwata koyilo z’ekyuma, ebikondo bya ppamba, n’okukozesa mu makolero okusinga okusaba.
Ebipimo by’omusingi bye bimu ku bisinga okubuusibwa amaaso ng’abaguzi balonze omusipi gwa PET (polyester strap) okukola emirimu gy’okusiba mu ngeri ey’otoma. Omusipi ogutuukana n’ebyetaago byonna eby’ebyuma —obugazi obutuufu, obuwanvu, n’amaanyi g’okumenya —gukyajja kuleeta obuzibu mu kuliisa singa obunene bwakyo obw’omusingi tebukwatagana na kigaba omutwe gw’omusipi. Core inner diameter, roll width, ne roll outside diameter byonna birina okukwatagana n’enkola ya spindle n’okusumulula ekyuma. Ekitabo kino kinnyonnyola ebipimo by’omusingi gw’omusipi gwa PET, engeri gye bikosaamu omulimu gw’omutwe gw’omusipi ogw’otoma, n’engeri y’okukakasa okukwatagana nga tonnagula.
Okukakasa omutindo gwa PET strap (polyester strap) nga tonnakkiriza kiziyiza okulemererwa kw’emigugu egy’ebbeeyi n’okutaataaganyizibwa mu mirimu. Ekitabo kino kikwata ku mitendera emikulu egy’okukakasa omuli okugezesa amaanyi g’okumenya, okupima obutuufu bw’ebipimo, okwekenneenya kungulu, n’okwekenneenya ebiwandiiko. Okusinziira ku ASTM D3950 specifications, okukakasa omutindo kulina okukakasa tensile strength, elongation, ne dimensional tolerances . Okugoberera enkola entegeke ey’okukakasa kiyamba abakugu mu kugula ebintu okulaba nti omusipi ogufunibwa gutuukana n’ebisaanyizo ebiragiddwa.