A sliding window where glass shutters move left and right on rails (tracks) instead of opening outward. These are common for bedrooms, balconies, and kitchens.

2.5 Track – A 2.5-track frame means:
• 2 tracks for glass shutters
• ½ extra track for fly mesh (mosquito mesh)
• 2 glass sliding panels and 1 mosquito mesh panel

80 × 48: This is the window size (usually in inches in India):
• Width: 80 inches (≈ 6 ft 8 in)
• Height: 48 inches (≈ 4 ft)
• 2032 mm × 1219 mm Approx in mm