G.Glass
A manufacturer of industrial sight glasses glass-pipes and discs, micro electrodes small scale glassware,customized production of glass instruments for industrial,educational and scientific applications.
http://www.g-glass.com.au/

Okandan Glass
Okandan Cam San. Ve Tic. A.S.
http://www.okandanglass.com/

Fop Sight Company
Archery Bow String Peep Sight
http://fopsight.com

ATM Projects Page
8 inch Dobsonian, reflex sight, barndoor mount, quadrant, and sight tube, and images.
http://www.geocities.com/kendurkin/AstronomyPage.html

Custom Glass Corporation
Custom Glass Corporation offers Custom Fabricated Glass, Specialty Glass, Bent Glass, Bulletproof Glass, Silk Screened Glass, Security Glass, Transportation Glass, Bullet Resistant Glass, Safety Glass, and much more
http://www.customglass.com

NGF Canada Ltd
Manufacturer of specialised glass fibre, rubberized glass cord and glass flake. Owned by NGF (Europe), part of NSG (Japan). E-glass, K-glass and U-glass
http://www.ngfcanada.com

L.J. Star, Inc.
Metaglas safety glass products, sanitary service products, visual flow indicators, sight glasses, ports and gages, accessories.
http://www.ljstar.com/

T. G. Rankin Company
Providing our customers with the highest possible value is creed, which guides each of four divisions: Glass, Industrial, Plumbing and OEM.
http://www.tgrankin.com/

L.J. Star, Inc.
Provider of innovative and value priced illumination sources, Metaglas safety glass products, sanitary service products, visual flow indicators, sight glasses, ports and gages, and accessories.
http://www.ljstar.com/

Nippon Glass Fiber
“ú–{”Ɏqƒgƒbƒvƒy[ƒWB‘‹ƒKƒ‰ƒX‚ð‚¨’T‚µ‚Ì•û‚âAŒš’zEÝŒvŽmŒü‚¯‚ÌŒš’z—pƒKƒ‰ƒXAŽ©“®ŽÔ—pƒKƒ‰ƒXAî•ñ“dŽqAƒKƒ‰ƒX‘@ˆÛAƒoƒCƒIŠÖ˜A‹@ŠíAd‹à‘®‹z’…ÜE•s—n‰»ÜAƒNƒŠƒXƒ^ƒ‹ƒKƒ‰ƒX‚̐»•iî•ñB“ŠŽ‘‰Æî•ñAƒvƒŒƒXƒŠƒŠ[ƒXACSREŠÂ‹«Šˆ“®AÌ—pî•ñ‚È‚Ç‚ðŒfÚB
http://www.nsg.co.jp/