Eleyi didara borosilicategilasi bongifaworanhan ekan wa ni 14mm Ọkunrin tabi 19mm Awọn iwọn Ọkunrin.
Awọn ifaworanhan ewebe wọnyi ṣe ẹya iho apata nla kan, awọn okuta didan ita fun mimu ati yago fun ooru, ati ilana adikala yiyi ni ọpọlọpọ awọn aṣayan awọ.