Product Description:

Material: Metal frame

Aluminum alloy

Size: 13(330 mm), 14(350 mm), 15(380 mm), 16(410 mm), 17(430 mm),

18(450 mm), 19(480 mm), 20(510 mm), 21(530 mm), 22(550 mm),

24(610 mm), 26(650 mm), 28(710 mm)

Characteristics:

1. Slient and judder free operation

2. Easy to install