What coverings can be added to the polyurethane timing belt? What special processing does the synchronous belt have?

[Processing method of polyurethane timing belt] 1. What kinds of coverings can be added to the polyurethane timing belt? Ordinary red rubber, natural red rubber, white rubber, black natural rubber, white PU, transparent PU, gray straight pattern, grass green pattern, 3.7P8DN dark green pattern, blue cloth pattern, fish bone pattern, sponge, APL, etc. 2. What special processing does the synchronous belt have? Adding stoppers, milling teeth, perforating, surface rubber digging windows, grinding windows, horizontal grooves, V-shaped grooves, half-side rubber, adding guide bars, etc., and special processing according to customer requirements.