36mm black plastic or nylon wheel, wheel color can be customized, customer usually use white or black color, 15mm wide, plain bearing, with 40kg load capacity.
â—†Various styles are available: tower aluminium casement windows, tingkap aluminum casement. . . . . .â—†Glass heat insulation: the use of heat insulation materials such as multi-layer glass and laminated glass can effectively reduce energy transfer, red