•采用優(yōu)良工程塑料注塑加工制成，密度大更牢固；

•原材料中加有抗紫外線的原料，抗老化性能強(qiáng)、使用壽命更長(zhǎng)久；密封嚴(yán)密、開啟 靈活、進(jìn)風(fēng)口加有防鳥網(wǎng)網(wǎng)；

•雙排彈簧確保側(cè)風(fēng)窗密封良好

• Made of excellent quality engineering plastic by injection molding, higher density and more firmly.

• With UV resistant additive, air inlet has stronger anti-aging ability, longer service life, better sealing, flexible opening, with anti-bird nets.

• Double springs ensures excellent sealing.