Q1: Are the window dimensions precise? Will it fit my food cart/counter?A1: Strict size control! The window frame installation size is 915x915 mm / 36x36 inch, suitable for standard food cart/counter openings. Please measure your installation space before purchasing.Q2: Is the acrylic (PMMA) prone to cracking or scratching?A2: Highly durable! The upgraded 4mm PMMA acrylic offers impact resistance superior to regular glass, able to withstand bumps from food carts and harsh environments like high heat and oil fumes.Q3: Can the hydraulic rods stably support an 85° opening angle?A3: Dual hydraulic rods provide strong support! Using 420 series hydraulic rods (150mm stroke), the window opens and closes smoothly and can stay suspended at any angle—ideal for frequent use scenarios.Q4: Are the locking points prone to rusting?A4: Galvanized anti-rust treatment! Locking points feature a zinc alloy coating and pass a 72-hour salt spray test, offering better rust resistance than ordinary locks for long-term outdoor use without worry.Q5: Does it include a screen? How do I clean it?A5: Designed for easy maintenance! This version does not include a screen. The window surface can be cleaned with a damp cloth. The frame has a white powder-coated finish that resists oil stains.