MODULAR EXPANSION PANELS：Optional Add-On for Custom Configurations；We offer optional add-on panels and gate doors to complement the main dog playpen set. Perfect for: Extending the enclosure for multiple pets。 TIPS: Our dog pen is undergoing product upgrades. Two colorful flag stickers and two additional redesigned "L"-shaped corner connectors will be included randomly. TRANSPARENT & SAFE DESIGN: Our clear acrylic dog playpen features seamless, transparent panels that provide a bright, open environment, reducing stress for pets. Unlike metal bars with risky gaps, the smooth, gap-free design prevents climbing, escaping, or injuries like stuck paws. EASY ASSEMBLE & PORTABLE: This modular puppy playpen snaps together in minutes with a simple hand-tap system—zero tools, screws, or bolts required. Add extra panels to enlarge the enclosure as your pet grows or for multi-pet households. STURDY & STABLE: Each indoor dog fence panel locks securely with dual buckles, while reinforced bottom connectors feature suction cups that grip hardwood, tile, or laminate floors firmly. The anti-slip base ensures pets play safely without knocking over barriers while protecting floors from scratches. VERSATILE USE & EASY CLEANING: The small pet playpen is designed for puppies, kittens, bunnies, pigs, ferrets, the small dog play pen doubles as a play yard, training barrier, whelping box, or relaxation zone. The non-porous, rust-resistant acrylic surface wipes clean instantly—no stains, odors, or scrubbing. Modular Expansion Panels – Optional Add-On for Custom Configurations We offer optional add-on panels and gate doors (shown in images 1 & 2) to complement the main dog playpen set (image 3). Perfect for: Extending the enclosure for larger or multiple pets Creating functional partitions, such as sleeping or potty zones Replacing damaged panels without buying a full new set